GoIP32-X4-2G is a 32 Channels 128 SIMs GSM gateway, 4 SIM cards rotating in each channel. Our GoIPs come with all the common network, VoIP, and GSM features and they have been widely tested for compatibility, stability, and reliability. In addition, we’ve developed our proprietary Remote SIM technology for SIM card management without inserting SIM cards to GoIPs. Together with the SMS Server and SIM Sever, you can now build your own system for voice traffics between VoIP and GSM or a SMS Messaging system based on your application requirements. In addition, each GoIP is equipped with a Remote Control client which enables a secure remote access method for technical support and GoIP management. All of the above features are available at no additional charges.
Application

Key Features:
32 Channles 128 sim cards
4 SIM Card Rotating in each channel
Call from VoIP to GSM or GSM to VoIP
Bulk SMS
Auto check balance and recharge
Outbound call from voip
Inbound call from gsm
Remote management
IMEI Changable
Proxy Encryption Solution for IP Block
Software Features
VoIP Protocols:SIP2.0
Audio Codecs:g711(alaw/ulaw), g729, g723.1
DTMF format:SIP INFO, RFC2833, Inband
Packet Loss Concealment
Programmable Jitter Buffer:Fixed, Dynamic, Adaptive
Network Connection:DHCP, PPPOE, Static IP
STUN Server
Support English, Chinese
Support Signaling encryption
Support media encryption
Support Media NAT Traversal
Support Remote control
Hardware Features
Channels:32
SIM Slots:128
Power Adapter:DC12V/4.5A
CPU:ARM11/700MHz
RAM:128M
Flash:8M
GSM Frequency: 850/900/1800/1900MHz
Max power consumption:30W
Net weight:2.8KG
Weight(Including AC/DC Adapter):4KG
Size:44cm*26.6cm*4.7cm
Operating Temperature:0-45℃
Working Humidity:10%-90%non condensation